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    • 40. 发明授权
    • Aqueous copolymer dispersions of water-soluble monomers with N-vinyl
groups and hydrophobic monomers
    • 水溶性单体与N-乙烯基和疏水性单体的水共聚物分散体
    • US6107397A
    • 2000-08-22
    • US42744
    • 1998-03-17
    • Rainer BlankenburgVolker SchehlmannKarl Kolter
    • Rainer BlankenburgVolker SchehlmannKarl Kolter
    • C08F2/22A61K9/50C08F4/04C08F4/28C08F4/30C08F226/00C08L39/04C08L39/06
    • A61K9/5026C08F226/00
    • An aqueous copolymer dispersion is prepared by free-radical emulsion co-polymerization of a monomer mixture ofi) from 10 to 70% by weight of at least one nonionic monomer A having a water-solubility of more than 60 g/l at 25.degree. C., and being selected from the group consisting of N-vinyllactams having from 6 to 8 carbon atoms, N-vinylformamide and N-methyl-N-vinylacetamide,ii) from 30 to 90% by weight of at least one monoethylenically unsaturated hydrophobic monomer B having a water-solubility of less than 60 g/l at 25.degree. C.,and optionally further comprisingiii) up to 5% by weight of at least one monoethylenically unsaturated monomer C which has at least one ionic and/or ionizable functional group,iv) up to 10% by weight of at least one monomer D which has at least 2 ethylenically unsaturated bonds,v) up to 20% by weight of at least one further monoethylenically unsaturated monomer E, which is different from the monomers A and C, and has a water-solubility of >60 g/l at 25.degree. C.,in the presence of a water-soluble polymerization initiator in water or an aqueous solvent.
    • 通过自由基乳液共聚制备水性共聚物分散体,该单体混合物为i)10至70重量%的至少一种在25℃下具有大于60g / l的水溶性的非离子单体A 并且选自具有6至8个碳原子的N-乙烯基内酰胺,N-乙烯基甲酰胺和N-甲基-N-乙烯基乙酰胺,ii)30至90重量%的至少一种单烯属不饱和疏水性 单体B在25℃具有小于60g / l的水溶性,并且任选地还包含iii)至多5重量%的至少一种具有至少一个离子和/或可离子化的单烯属不饱和单体C 官能团,iv)至多10重量%的至少一种具有至少2个烯键式不饱和键的单体D,v)至多20重量%的至少一种另外的单烯属不饱和单体E,其不同于单体 A和C,并且在25℃下的水溶解度> 60g / l 在水或水溶剂中存在水溶性聚合引发剂的情况下。